Printing-film holder.



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APPLICATION FILED NOV. 3. 1906.

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PATENTED NOV. 12, 1907.

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S. W. GUEST. PRINTING FILM HOLDER.

APPLIOATION FILED NOV. a, 1906.

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No. 870,722 PATENTED NOV. 12, 1907. S. W. GUEST.

PRINTING FILM HOLDER. APPLICATION FILED novla, 1oos.

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In venfi UNITED STATES PATENT OFFICE.

SAMUEL WALLACE GUEST, OF BUFFALO, NEW YORK, ASSIGNOR TO DIAMOND SHADING FILM COMPANY, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

PRINTING-FILM HOLDER.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed November 3, 1906. Serial No. 341,955.

To all whom it may concern:

Be it known that I, SAMUEL WALLACE Gons'r, a citizen of the United States, residing at Buffalo, in the county of Erie and State of N ew York, 'have invented a new and useful Improvement in Printing-Film Holders, of which the following is a specification.

My invention relates to printing film holders, and has for its object the provision of a film-holder having a wide range of application and adjustment, portable in character, and both delicate and accurate in its micrometical adjustment.

In the use of printing-film holders it is a desidoratum that the holder be capable of a wide range of emplacement and at the same time delicately adjustable and rigid; and also that the same may be portable as a Whole, and that the same may be movable from one standard to another.

To this end'my invention consists in the apparatus illustrated in the annexed drawings in which like characters indicate like parts, in which,

Figure l is a perspective of the entire apparatus. Fig. 2 is a horizontal central section of the micrometer parts and horizontal pivot device. Fig. 3 is a transverse section on the line .r-;r, Fig. 2. Fig. 4 is a section of a micrometer sleeve Fig. 5 is a vertical central section of said pivot device and a side elevation of the forward-andback micrometer. Fig. 6 is a front elevation of the transverse micrometer and sleeve for carrying the pivot rod. Fig. 7 is a horizontal section of the releasing pivot-bracket. Fig. 8 is a section on the line y.y of Fig. (5. Fig. 9 is a vertical central section of the fixed pivot bracket. Fig. 1.0 is a section on the line zz of Fig. 9. Fig. 11 is a perspective of a modified form of standard.

I will first describe the principal parts of the apparatus, showing their relation to a printing frame and a stone upon which work is to be done.

1 is a cylindrical standard which is rigidly mounted upon a base plate 2 and braced by web-feet 3. This standard should be very rigid by containing a liberal amount of metal and the webbing should brace it thoroughly to prevent any vibration. It must be accurately finished and fitted to the sleeve 4 which is adjustable up and down thereon by a set-screw 5. The sleeve 4 carries rigidly. secured to it the arm (3. The arm 6 is pivoted to the arm 8 and the two arms 6 and 8 are locked by the screw 7 in any desired position. The arm 8 is pivoted to the arm 10 and similarly adjustable by means of the screw 9. The arm 10 is pivoted to, the yoke 12 by a vertical pivot and is capable of being locked in any desired position by the screw 11. The yoke 12 carries the rod 13, which rod is longitudinally adjustable in said yoke. The rod 13 carries upon one end a fixed pivot bracket 14 and upon the other a movable pivot bracket 15. The film holder 16 is carried by the pivot points 29 and 30 on the two brackets 14 and 15, and is shown in place upon a stone 17. From this general description it will be seen that, first, the entire apparatus is portable; second, that it may be adjusted to work in any plane, from that when the base is on the same plane with or upon a somewhat higher plane than the face of the stone, to the plane of the thickest stone; third, that it may be operated upon a plane not horizontal; fourth, that the range of emplacement of the film forward and back and from one side to the other is large; fifth, that a film may be shifted obliquely without disturbing the emplacement.

Referring now to Fig. 11, it will be seen that I have further increased the range of utility by means of the standard 1, which is bent at right angles at the bottom and secured to a plate 2", which, in turn, is secured to a wall or other fixed object. The standards 1 and 1 are the same diameter. By loosening the set screw 5 the sleeve 4 may be slipped from one standard and placed upon another, thus enabling a lithographer to use the same either at an ordinary table or at a wall table. Thus the film holder may be readily shifted from one piece of work to another and shifted back again with great facility, materially increasing the amount of work that may be done with one holder and avoiding the shifting of work from one table to another.

I will now describe in greater detail the several constructions employed. The arm 10 is hollow, as shown in Fig. 2, and receives the shank 18. This shank 18 can move longitudinally in the arm 10, but is held against movement in rotation by-ineans of a lug 19 which is secured to the shank 18 by a screw and which may move longitudinally in a slot in the arm 10. The shank 18 at its outer end is of the same diameter as the arm 10, and the adjacent portions of said arm and shank are threaded'right and left to receive the micrometer sleeve 20 similarly threaded internally. By slight rotation of the sleeve 20 the frame 16 may be micrometically adjusted forward and back. The yoke 12 carries sleeves 21 and 22 and these sleeves carry the red 13. When the set screws 23 and 24 are not screwed down the rod 13 may move in rotation and longitudinally in said sleeve, but when said set screws 23 and 24 are set down, the rod 13 is held firmly. The abutting ends of the sleeves 21 and 22 are screw-threaded (not right and left) and a micrometer sleeve 25 engages said threads. The sleeve 25 fits nicely into the yoke 12 so that it has no end-play. The sleeves 21 and 22 are held against rotation by lugs 26 and 27, similar to the lug l9 and performing the same function. By rotation of the sleeve 25 micrometical movement of the film holder from side to side is attained.

The yoke 12 is pivoted at 28 to the shank 18 and the screw 11 clamps this joint when screwed down. By

means of this pivot movement in the plane of work may be imparted to the film over an arc of a circle, thus enabling the operator to bring the film square on the work, or to work at an oblique angle. l The film holder is supported on pivot points 29 and i 30 in the usual manner. The pivot point 29 is mounted l in the bracket 15 and is held against rotation by a i screw-and-slot, as shown at 31, and is normally forced inwardly by a spring 32. A head 33 is provided for i readily retracting the same by hand. The pivot 30 is fixed against longitudinal or rotary movement in the bracket 14; but in order to bring the axis of the pivots i 29 and 30 exactly in plane with the work, I mount the 1 -pivot point 30 on a block 34 whichmay be moved up or down on guides 35 in the bracket 14 by means of the screw 36. By this means I am able to secure absolute parallelism between the work and the film.

It will be noted that the rod 13 may be moved longitudinally a considerable distance. This enables me toapply the film over a much Wider area than could otherwise be done. It will also be noted that the pivot at 11 enables me to square the film with the Work or to apply it at varying angles, and that the block and screw 34,36 enable me to attain the necessary parallelism. Combining these adjustments with the micrometical movements and the wide range of general adjustments secured by the arms 6, 8, and 10, and, finally the portability of the device, I have secured a universality and adaptability of large utility.

Having thus described my invention, what I claim 1s:

1. A standard composed of a single weighted column and a base plate rigidly secured thereto, a vertically adustable sleeve thereon, lever arms pivoted thereto, means carried by said lever arms for holding a print frame and means for locking said lever arms to establish the working position of a frame in any desired plane.

2. A standard composed of a single weighted column and a base plate rigidly secured thereto, a vertically adustable sleeve thereon, lever arms pivoted thereto, means carried by said lever arms for holding a print frame and means for locking said lever arms to establish the workmg position of a frame in any desired plane and micrometical means for perfecting the adjustment.

3. A standard, a vertically adjustable sleeve thereon, lever arms pivoted thereto, means carried by said leverarms for holding a print frame and means for lockin said lever arms to establish the working position of 2 frame in any desired plane and a swivel joint for squaring the work or Working at different plane.

4. A standard composed of a single weighted column and a base plate rigidly secured thereto, and adjustable said yoke, pivots for holding a print frame carried by said rod, and means for moving said rod axially and locking the same to extend laterally the scope of emplacement of the frame.

6. A weighted single standard rigidly mounted upon a portable base, a sleeve adjustableon said standard, means for clamping the same to said standard, pivoted leverarms carried by said sleeve. means for clamping said arms together, a yoke carried by said arms, a rod carried by said yoke. pivoted brackets carried by said rod, means for clamping said rod in said yoke, and pivot points carried by said brackets for engaging a film frame.

7. A standard, a sleeve adjustable on said standard, means for clamping the same to said standard pivoted lever-arms carried by said sleeve, means for clamping said arms together, a yoke carried by said arms, a rod carried by said yoke, pivot brackets carried by said rod, means for clamping said rod in said yoke, pivot points carried by said brackets, and micrometical devices for imparting movement of-adjustment to said rod axially and transversely respectively.

87 A standard, a sleeve adjustable, on said standard, means for clamping the same to said standard, pivoted lever-arms carried by said sleeve, means for @lamping said arms together. a yoke carried by said arms, a rod carried by said yoke, pivot brackets carried by said rod, means for clamping said rod in said yoke, pivot points carried by said brackets, and a hinge and means for clamping the same interposed between said yoke and its adjacent lever arm whereby a film may be moved over an arc of a circle in the plane of application of the film.

D. A standard, a sleeve adjustable on said standard, means for clamping the same to said standard, pivoted lever-arms carried by said sleeve, means for clamping said arms together, a yoke carried by said arms, a rod mounted slidably in said yoke and set screws for clamping the same, whereby a film may be moved from side to side without disturbing the adjustment of said lever arms, and film-frame pivots carried'by said rod.

In testimony whereof I have hereunto set my hand in the presence of two witnesses.

S. WALLACE GUEST.

Witnesses E. A. KELLY, A. N. Mncorrnnu.

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